Water-tube boiler.



No. 794,388. PATENTBD JULYll, 1905. G. Y. BONU".

WATER TUBE BOILER.

APPLICATION FILED SEPT. 23. 1904.

4 SHEETS-SHEET 14 No. 794.338- PATENTED JULY 11, 1905.

G. Y. BONUS. I

WATER TUBE BOILER.

APPLIOLTION FILED SEPT. 23, 1904.

4 SHEETS-SHEET 2.

4 SHBETS-SHEBT 3.

\ O 0 000 0 QQQOOOODOOOOO I I PATENTBD JULY 11, 1905.

G. Y. BONUS.

WATER TUBE BOILER.

APPLIOATION FILED SEPT. 23. 1904.

ill/672201" G60/ cy 072606 7 oomooooooooooooooooooooooooo Q. rnooonoo eoooooooooo PATENTED JULY 11, 1905.

G. Y. BONUS.

WATER TUBE BOILER.

APPL'IQATION FILED SEPT. 23. 1904.

4 SHEETS-SHEET 4.

UNITED STATES Patented July 1 1, 1905.

GEORGE Y. BONUS, OF CHICAGO, ILLINOIS.

WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 794,338, dated July 11, 1905.

Application filed September 23, 1904. Serial No. 225,696.

To all whom it may concern:

posed to the hot gases; second, to provide the boiler with such flues for the hot gases as to cause perfect combustion; third, to facilitate the easy flow of water through the boiler; fourth, to facilitate the easy cleaning of the boiler; fifth, to construct a boiler to occupy theleast possible space and give the greatest possible results; SlXtllfllO provide a triangular header; seventh, to provide a steam-superheater in connection with the boiler, and other objects which will become apparent from the description to follow.

Itis always desirable in boilers to have as much as possible of the exterior surface of the drums and tubes containing the water exposed to the hot gases, to have the hot gases circulate around said tubes and drums to give the best results, to construct the boiler so that the flow of water therethrough will at no point be retarded, to provide means of ready access to the parts requiring to be cleaned out, to keep the dimensions of the boiler as small as possible, and to make a cheap and, durable construction. These advantages are all attained by my invention.

The boiler consists of three headers, arranged in a triangle connected by a plurality of tubes. The two rear headers are preferably cylindrical in form and ar ranged vertically one above thevother, while the front header is of a rectangular flat box form with the side facing rearward formed with a hori zontal ridge or apex, so that the tubes connecting the rear drums with the forward header enter the latter at right angles.

Another feature of this invention is to provide amply suflicient water-surface in the boiler and conveniently arrange a steam-superheater in connection therewith. Suitable foundations, arches, and walls are built about these headers and tubes to provide the desired fines for the hot gases to pass through.

Referring to the accompanying drawings, which form a part of this specification, Figure l is a longitudinal vertical section, partly in elevation, of a boiler embodying my invention. Fig. 2 is an elevation of a portion of the same, showing the connections. Fig. 3 is a section on line 3 3 of Fig. 2 viewed in the direction indicated by the arrows. Fig. 4: is an enlarged vertical section of the front header. Fig. 5 is a front elevation of the front header, partly in section, on line 5 5 of Fig. 4; and Fig. 6 is a longitudinal vertical section of a boiler, showing a modification.

Similar reference characters refer to similar parts throughout the several views.

The boiler proper consists of the front header 5, the lower rear headero, the upper rear header 7, the tubes 8, connecting the headers 5 and 6, the tubes 9, connecting the headers 6 and 7, and the tubes 10, connecting the headers 5 and 7. As shown, the front header is preferably made with its rear side lying in two different planes, so that the tubes 8 and 10 have their axes at right angles to the rear side of the header 5. This construction of the rear side, (the front side of said header 5 being per1')cndicular,),besides affording a cheap and simple manner of connecting the tubes 8 and 10, increases the capacity of the middle part of the header 5, so that the flowing capacity through the header 5 from the tubes 8 to the tubes 10 is at any point substantially equal to the flowing capacity through the tubes 8 or 10, and thus the water flowing from the lower part of the boiler to the upper part of the boiler is in no way impeded. To prevent the pressure within the boiler from bulging out either side of the header 5, the ordinary tie-bolts 11 are secured to the front and rear sides.

It is necessary at times to clean out the interior of the tubes 8 and 10, and to facilitate this cleaning the hand-holes 12 are provided in the front plate of the header 5, one concentric with each tube 8 and 10. Since the tubes 10 incline down toward the front and the tubes 8 incline up toward the front, it is possible to have one horizontal row of hand-holes 13 serve for the lower row of tubes 10 and the upper row of tubes 8.

The upper rear header 7 is provided with one or more steam-pipes 14 and a manhole 15. The lower rear header 6 is provided with a water-supply pipe 16, a manhole 17, and a blow-off pipe 18.

The front header 5 rests upon the front wall 19, and the lower rear header 6 rests upon the wall to support the boiler.

A top wall or partition 21 and side walls 22, extending from the front wall 19 to the chimney-wall 23, together with the front wall 19 and chimney-wall 23, inclose the entire boiler, excepting the front plate of the front header 5, which is covered by the ordinary boilerfront 24. The grate-bars 25 are supported in the usual way between the front wall 19 and the fire-arch 26.

The roof 27 of the fire-box lies adjacent to and parallel with the lower row of tubes 8 to a point just beyond the fire-arch 26, where it extends on a more abrupt angle in the shape of an arch 28 within several feet of the rear wall 20, leaving the passage 29 between its end and the wall 20. The rear side of the fire-arch 26 is preferably inclined, as at 30, to form a passage between it and the arch 28.

A tile baffle 31 is built on the top row of the tubes 8, extending from within several feet of the header 5 to within a short distance of the header 6, leaving a large passage 32 between the front of the baffle 31 and the header 5 and a small passage 33 between the rear edge of the baffle 31 and the header 6.

The chimney-wall 23 is provided with a large opening 34, through which the hot gases pass into the chimney.

If perchancesorne soot or ash should settle in parts of the boiler inclosure, it can be removed through the manholes 35, provided in the side walls 22.

In operation the boiler is filled with water to the level indicated in Fig. 1 and by the dotted line 36 in Fig. 6, and the hot gases from the fire on the grate 25 pass rearward over the fire-arch 26, up through the passage 29, forward around the tubes 8, up through the passage 32, rearward around the tubes 10 and 9, headers 7 and 6, and finally through the opening 34 into the chimney. the gases after passing up through the passage 29 passes through the passage 33 and thence around the tubes 9 and header 6 through the opening 34.

I prefer to construct the boiler with a steamsuperheater, as shown in Figs. 1 and 2. The additional boiler or header 37 is provided near the front and above the header 5, so that the normal water-line in the boiler is about at the A portion of center of the header 37, the Water having access to said header through the tubes 38, forming communication between said header and the header 5. Within the header 37 above the water-line is a diaphragm 39, which forms a steam-dome in the top of said header, from whence the steam can be led off through the pipe 41. The diaphragm 39 is preferably made of sheet metal, is bent in the center, so as to be inserted through the manhole in the header 37 and when within said header the bend is sufficiently straightened to allow the diaphragm 39 to be supported within the header 37 by two of its edges resting on brackets or angle-irons secured to the interior of the header 37.. Thus the diaphragm 39 fits in the header 37 loose enough to allow the required communication between the dome 40 and the space below the diaphragm 39. If desired, the diaphragm 39 can be perforated.

The tubes 14 are connected between the headers 7 and 37 and are located to be surrounded by the hot gases passing through and around the boiler. The steam thus passing through the tubes 14 becomes superheated and after passing into the steam-dome 40 is prevented from coming in contact to any great degree with the water by the diaphragm 39.

In Fig. 6 is shown a modification omitting the superheating-tubes 14 and the header 37, the steam being taken off through the pipe 42 from the header 7. The tubes 8 and 9 are arranged in vertical rows at their rear ends, where they enter the headers 6 and 7, and are alternately staggered vertically at their front ends, where they enter the header 5, as seen in Fig. 5.

The arrows in Figs. 1 and 6 indicate the course of the hot gases through the boiler.

It is necessary in boiler construction to provide some means for drawing off the impurities in the water which settle in the bottom of the boiler. The generally-accepted theory of the action of the impurities in water inside of a boiler is that a portion of the heavier impurities settles to the bottom as soon as the water is slightly heated and further impurities will rise to the surface of the water in the form of a scum, which later also settles to the bottom. In the form of boiler shown in Fig. 1 I provide means for drawing off the impurities in both forms z'. 0., the scum and the sediment in the bottom of the boilerwhile in the form of boiler shown in Fig. 6 I provide the blow-off pipe 18 only, which serves to draw off the sediment in the bottom of the boiler.

Referring to Figs. 1, 2, and 3, the header or drum 37 is provided with a manhole 43, a blowoff pipe 44, and a combined feed and blow-off pipe 45 and an additional blow-off pipe 46. The blow-off pipe 44 extends along near the bottom of the drum 37 and has the holes 47 on its under side and the valve 50 on the exterior of the drum 37. The pipe 45 preferably is on an incline from below the waterline, where it enters the drum 37, upward to the surface of the water, where it is provided with a large opening 48. On the exterior of the drum 37 the pipe is provided with a valve 49, above which the feed-pipe 51 enters. The feed-pipe has the valve 52. The drum 7 is also provided with a blow-off pipe 53. The pipes 46 and 53 on the exterior of their respective drums incline downward toward each other and are connected to the settling-box 54, to the bottom of which is connected the pipe 55, provided with valve 56. Pipe 46 is provided with valve 57, and pipe 53 is provided with valve 58.

I desire to be understood not to limit my self to the exact construction defined by the interpretation of the appended claims only as necessitated by the prior state of the art, as radical changes in construction from that shown may be made without deviating from the scope of the invention.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent of the United States, is

1. In a water-tube boiler, a front header, an upper rear header, a lower rear header, a series of tubes connecting said front header and said upper rear header, a series of tubes connecting said upper rear header and said lower rear header, a series of tubes connecting said front header and said lower rear header, a baffle extending over the greater portionof said last-named series of tubes and an arch extending under the greater part of said last-named series of tubes.

2. In a water-tube boiler, a front header below the water-line, an upper'rear header partly above the water-line, a lower rear header below the waterline, a series of tubes connecting said front header and said upper rear header, a series of tubes connecting said upper rear header and said lower rear header,

and a series of tubes connecting said front header and said lower rear header.

3. In a water-tube boiler, a lower front header, an upper front header, a lower rear header, an upper rear header, a series of tubes connecting said lower front header and said upper rear header, a series of tubes connecting said upper rear header and said lower rear header, a series of tubes connecting said upper rear header and said upper front header, a series of tubes connecting said upper front header and said lower front header, a series of tubes connecting said lower front header and said lower rear header, abaffle extending over the greater portion of said last-named series of tubes and an arch extending under the greater part of said last-named series of tubes.

4:. In a water-tube boiler, a lower front header below the water-line, an upper front header partly above the water-line, an upper rear header partly above the water-line a lower rear header below the water-line, a se ries of tubes connecting said lower front header and said lower rear header, a series of tubes connecting said lower rear header and said upper rear header, a series of tubes con necting said lower front header and said upper rear header, a series of tubes connecting said lower front header and said upper front header, and a series of tubes connecting said upper front header and said upper rear header above the water line serving as a steam-superheater.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 30th day of August, 1904, at Chicago, Illinois.

GEORGE Y. BONUS.

Witnesses:

MABEL SMITH, R. J. JAoxER. 

